Chemical analysis of tooth enamel has identified the geographic origins of enslaved Africans buried on the remote island of St Helena [1].
This discovery provides a rare scientific record of individuals who escaped the illegal slave trade but died before they could return home. By tracing the chemical signatures in teeth, researchers can now map the diverse regions of Africa from which these people were taken [2].
Between 1840 and 1863, the British Royal Navy rescued nearly 27,000 Africans from illegal slave ships [3]. These individuals were brought to St Helena, a volcanic island located about 1,200 miles off the southwestern coast of Africa [1]. The island served as a processing center for the Liberated African Establishment, where the British naval personnel oversaw the rescued populations [1].
Despite their rescue from the ships, the transition to the island was often fatal. Harsh living conditions and disease led to the deaths of about 8,000 liberated Africans shortly after their arrival [1]. Many of these individuals were interred in unmarked graves in Rupert’s Valley [2].
Because the graves were unmarked, the specific identities and origins of the deceased remained unknown for nearly two centuries. The use of strontium and oxygen isotope analysis on tooth enamel allows scientists to bypass the lack of written records. This method identifies the geological and environmental markers present in the water, and food the individuals consumed during childhood [2].
This scientific approach reveals that the rescued populations came from various disparate regions across the African continent [1]. The findings highlight the scale of the illegal slave trade that persisted even after the British had officially abolished the practice in the early 19th century [2].
“Chemical analysis of tooth enamel has identified the geographic origins of enslaved Africans buried on the remote island of St Helena.”
This research transforms unmarked graves into a data-driven map of the mid-19th century slave trade. By identifying the specific origins of the deceased, historians can better understand the reach of illegal trafficking networks and the failure of the British processing system to sustain the lives of those it rescued.
